This paper presents a middleware that enables the efficient delivery of events carrying large attachments. We transparently decouple event-description from event-data, in order to avoid useless data-transfers and modifications to endpoints business logic. Our solution relieves the event-delivery system of large data transfers, by enabling direct, but trans- parent, publisher to subscriber data-exchange. The experiments show that we can reduce the average event delivery time by half, compared to a standard approach requiring the full mediation of the event-delivery system. 28th Symposium On Applied Computing (SAC 2013)